Hello,
No, cannot EDIT or CREATE any styles, but there are a lot of styles from other keyboards that you can load into the "flash" area and also save to a "program" area. I'd bet that you could find some that you are looking for. I have an EXR7s and really like it.
zuki
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Live: Korg PA4X/EV Everse 8s/Senn 935/K&M stand
Studio: Korg PA4X/Yamaha DGX670/Nord 6D73/Boss BR900CD/Tascam DP24SD/MTM Iloud/Sony C80/AGK 214/ATEM Mini Pro switcher/K&M stand